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LWG 1118

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant
2010-11-17 19:22:43 +00:00
parent e32b5e2f23
commit 86ed8aefb2
4 changed files with 65 additions and 54 deletions
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37
test/utilities/tuple/tuple.tuple/tuple.helper/tuple_size.pass.cpp
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@@ -18,26 +18,23 @@
#include <tuple>
#include <type_traits>
template <class T, std::size_t N>
void test()
{
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<const T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<volatile T> >::value), "");
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
std::tuple_size<const volatile T> >::value), "");
}
int main()
{
{
typedef std::tuple<> T;
static_assert((std::is_base_of<std::integral_constant<std::size_t, 0>,
std::tuple_size<T> >::value), "");
}
{
typedef std::tuple<int> T;
static_assert((std::is_base_of<std::integral_constant<std::size_t, 1>,
std::tuple_size<T> >::value), "");
}
{
typedef std::tuple<char, int> T;
static_assert((std::is_base_of<std::integral_constant<std::size_t, 2>,
std::tuple_size<T> >::value), "");
}
{
typedef std::tuple<char, char*, int> T;
static_assert((std::is_base_of<std::integral_constant<std::size_t, 3>,
std::tuple_size<T> >::value), "");
}
test<std::tuple<>, 0>();
test<std::tuple<int>, 1>();
test<std::tuple<char, int>, 2>();
test<std::tuple<char, char*, int>, 3>();
}